Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
As shown in Figure 3, be the structure chart of the 65 degree antenna elements 4 row dual-polarization intelligent antennas mentioned among the present invention.This antenna comprises 8 prevention at radio-frequency port at most, wherein, 1,2,3,4 is+45 degree polarization ports, 5,6,7,8 is-45 degree polarization ports, simultaneously, 1 and 5 is same row ± 45 degree dual polarization ports, and 2 and 6 is same row ± 45 degree dual polarization ports, 3 and 7 is same row ± 45 degree dual polarization ports, and 4 and 8 is same row ± 45 degree dual polarization ports.
The present invention mainly be to same row+/-45 degree polarization ports synthetic figuration that polarizes, adopt the method for antenna transmit diversity to carry out data transmission then, not only guarantee the performance requirement of control channel and broadcast channel, also guaranteed the covering requirement of control channel and broadcast channel simultaneously.
As shown in Figure 4, the flow chart for the antenna transmit diversity method of the embodiment of the invention may further comprise the steps:
Step S401, modulation symbol form the symbol of virtual port through the coding back.
In step S401, virtual port comprises the physical antenna port of same row+/-45 degree.
Step S402, the synthetic figuration that polarizes becomes the symbol of physical antenna port with the sign map of virtual port, and passes through the emission of physical antenna port.
In step S402, the identical data of polarization port emission of the polarization port of same row+45 degree and-45 degree.
Be that example is specifically described with two embodiment below, by the description of specific embodiment, the present invention is above-mentioned and/or that add, and aspect and advantage will become more obvious.
Embodiment 1
As shown in Figure 5, synthesize the figuration schematic diagram for the 8 antenna ports polarization of one embodiment of the invention.The weights of the synthetic figuration of polarization are [1,1], and like this, 8 physical antenna ports are virtual to be 4 virtual ports, promptly 1 and 5 virtual be 1 port one ', 2 and 6 virtual be 1 port 2 ', 3 and 7 virtual be 1 port 3 ', 4 and 8 virtual be 1 port 4 '.
Then, again in conjunction with the SFBC+FSTD transmit diversity techniques of 4 antenna ports, realize the transmit diversity of 4 row dual-polarization intelligent antennas of 65 degree antenna elements jointly.
As shown in Figure 6, the flow chart for 4 antenna transmit diversity methods of one embodiment of the invention may further comprise the steps:
Step S601 to the modulation encoding symbols, obtains the symbol of 4 virtual ports.
In Fig. 6, modulation symbol s
3s
2s
1s
0Through the symbol of 4 virtual ports of SFBC+FSTD coding back formation, its sign form on each virtual port is as follows:
1) virtual port 1 ' symbol be s
0-s
1 *00, the corresponding different subcarrier of each symbol wherein, the mapping format of RE is as follows:
2) virtual port 2 ' symbol be 00 s
2-s
3 *, the corresponding different subcarrier of each symbol wherein, the mapping format of RE is as follows:
3) virtual port 3 ' symbol be s
1s
0 *00, the corresponding different subcarrier of each symbol wherein, the mapping format of RE is as follows:
4) virtual port 4 ' symbol be 00 s
3s
2 *, the corresponding different subcarrier of each symbol wherein, the mapping format of RE is as follows:
Step S602, the synthetic figuration that polarizes becomes the symbol of 8 physical antenna ports with the sign map of 4 virtual ports, and passes through the emission of physical antenna port.
As shown in Figure 6, through after the antenna terminal mapping, same row+the identical data of/-45 degree polarization port emissions.Particularly, the data of emission are as follows on the physical antenna port one-8:
Antenna 1:s
0-s
1 *00;
Antenna 5:s
0-s
1 *00;
Antenna 2:0 0 s
2-s
3 *
Antenna 6:0 0 s
2-s
3 *
Antenna 3:s
1s
0 *00;
Antenna 7:s
1s
0 *00;
Antenna 4:0 0 s
3s
2 *
Antenna 8:0 0 s
3s
2 *
Embodiment 2
Antenna transmit diversity method of the present invention is not only applicable to 4 port transmit diversities, is applicable to 2 port transmit diversities yet, that is, 4 physical ports can getting in 8 antenna ports carry out 2 port transmit diversities.
As shown in Figure 7, synthesize the figuration schematic diagram for the 4 antenna ports polarization of another embodiment of the present invention.In the drawings, choose 1,2,5,6 array antennas, can certainly choose other array antennas.The weights of the synthetic figuration of polarization are [1,1], and like this, 4 physical antenna ports are virtual to be 2 virtual ports, promptly 1 and 5 virtual be 1 port one ', 2 and 6 virtual be 1 port 2 '.
Then, again in conjunction with the transmit diversity techniques of 2 antenna ports, realize the transmit diversity of 4 row dual-polarization intelligent antennas of 65 degree antenna elements jointly.
As shown in Figure 8, the flow chart for 2 antenna transmit diversity methods of another embodiment of the present invention may further comprise the steps:
Step S801 to the modulation encoding symbols, obtains the symbol of 2 virtual ports.
In Fig. 8, modulation symbol s
1s
0Through the symbol of 2 virtual ports of SFBC coding back formation, its sign form on each virtual port is as follows:
1) virtual port 1 ' symbol be s
0-s
1 *, the corresponding different subcarrier of each symbol wherein, the mapping format of RE is as follows:
2) virtual port 2 ' symbol be s
1s
0 *, the corresponding different subcarrier of each symbol wherein, the mapping format of RE is as follows:
Step S802, the synthetic figuration that polarizes becomes the symbol of 4 physical antenna ports with the sign map of 2 virtual ports, and passes through the emission of physical antenna port.
As shown in Figure 8, through after the antenna terminal mapping, same row+the identical data of/-45 degree polarization port emissions.Particularly, the data of emission are as follows on the physical antenna port one-8:
Antenna 1:s
0-s
1 *
Antenna 5:s
0-s
1 *
Antenna 2:s
1s
0 *
Antenna 6:s
1s
0 *
Antenna 3: do not launch;
Antenna 7: do not launch;
Antenna 4: do not launch;
Antenna 8: do not launch.
Should be understood that the foregoing description only is schematic embodiment, those of ordinary skill in the art also can carry out other modifications or variation according to such scheme, for example, chooses the antenna of other row, and these modifications or variation all should be included in of the present invention comprising within the scope.
The method that should also be understood that above-mentioned antenna transmit diversity is not only applicable to 65 degree antenna elements, 4 row dual-polarization intelligent antennas mentioned among the present invention, also is applicable to the many antennas of 4 row dual polarizations of other big spacing 65 degree antenna elements.
For implementing aforesaid method, the invention provides a kind of system of antenna transmit diversity, as shown in Figure 7.Fig. 7 has shown the structural representation of the antenna transmit diversity system of the embodiment of the invention, and this system comprises coding module 100 and mapping block 200.Coding module 100 is used for the modulation encoding symbols, to form the symbol of virtual port, wherein, virtual port comprises the physical antenna port of same row+/-45 degree, if antenna comprises 8 physical antenna ports, forms 4 virtual ports, the method that then adopts SFBC+FSTD is to the modulation encoding symbols, if antenna comprises 4 physical antenna ports, form 2 virtual ports, then only adopt the SFBC coding to the modulation encoding symbols; The mapping block 200 synthetic figuration that is used to polarize becomes the symbol of physical antenna port with the sign map of virtual port, and wherein, the polarization port of same row+45 degree and the polarization ports of-45 degree are launched identical data.
The present invention by to same row+/-45 degree polarization ports synthetic figuration that polarizes, adopt the method emission data of antenna transmit diversity then, not only guarantee the performance requirement of control channel and broadcast channel, also guaranteed the covering requirement of control channel and broadcast channel simultaneously.
Those skilled in the art are appreciated that and realize that all or part of step that the foregoing description method is carried is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, this program comprises one of step or its combination of method embodiment when carrying out.
In addition, each functional unit in each embodiment of the present invention can be integrated in the processing module, also can be that the independent physics in each unit exists, and also can be integrated in the module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If described integrated module realizes with the form of software function module and during as independently production marketing or use, also can be stored in the computer read/write memory medium.
The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.